[quote=@Omega Man]
Where does the Cyborg 009 vs Devilman series fit in? I've quite literally just got into both of these franchises so I was at a loss for words when finding out they crossed over.
[/quote]

The thing about crossovers is they only matter if a Transformer, Ultraman, or Kamen Rider Decade shows up in them. Otherwise, they're self-contained things that will never be referenced again, unless it's another crossover.